Update docs for v1.0.0 alpha.5 (#70)

* Document `ignoreElements` input

* Update changelog for v1.0.0-alpha.5

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Prior to v1.0.0-alpha.1, logs were generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+## [v1.0.0-alpha.5](https://github.com/netlify-labs/netlify-plugin-a11y/compare/v1.0.0-alpha.4...v1.0.0-alpha.5)
+
+### Added
+- New input: `ignoreElements`. Used to indicate to the test runner elements which should be ignored during a11y testing.
+### Changed
+- Lowers minimum required version of Node from `12.13.0` to `12.0.0`.
+- Internal: Uses a local server powered by the Node `http` module to host files prior to testing. This local server makes tests more accurate and more secure!
 ## [v1.0.0-alpha.4](https://github.com/netlify-labs/netlify-plugin-a11y/compare/v1.0.0-alpha.3...v1.0.0-alpha.4)
 ### Changed
 - Added a pre-release notice to the README, as well as other copy cleanup.

README.md

@@ -92,12 +92,13 @@ If you want to use the plugin's default settings (check **all** pages of your si
 If you've installed the plugin via `netlify.toml`, you can add a `[[plugins.inputs]]` field to change how the plugin behaves. This table outlines the inputs the plugin accepts. All of them are optional.
 
 
-| Input name          | Description                                              | Value type       | Possible values                               | Default value |
-|---------------------|----------------------------------------------------------|------------------|-----------------------------------------------|---------------|
-| `checkPaths`        | Indicates which pages of your site to check              | Array of strings | Any directories or HTML files in your project | `['/']`       |
-| `failWithIssues`    | Whether the build should fail if a11y issues are found   | Boolean          | `true` or `false`                             | `true`        |
-| `ignoreDirectories` | Directories that *should not* be checked for a11y issues | Array of strings | Any directories in your project               | `[]`          |
-| `wcagLevel`         | The WCAG standard level against which pages are checked  | String           | `'WCAG2A'` or `'WCAGA2A'` or `'WCAG2AAA'`     | `'WCAG2AA'`   |
+| Input name          | Description                                               | Value type            | Possible values                                       | Default value |
+|---------------------|-----------------------------------------------------------|-----------------------|-------------------------------------------------------|---------------|
+| `checkPaths`        | Indicates which pages of your site to check               | Array of strings      | Any directories or HTML files in your project         | `['/']`       |
+| `failWithIssues`    | Whether the build should fail if a11y issues are found    | Boolean               | `true` or `false`                                     | `true`        |
+| `ignoreDirectories` | Directories that *should not* be checked for a11y issues  | Array of strings      | Any directories in your project                       | `[]`          |
+| `ignoreElements`    | Indicates elements that should be ignored by a11y testing | String (CSS selector) | Comma-separated string of CSS selectors               | `undefined`   |
+| `wcagLevel`         | The WCAG standard level against which pages are checked   | String                | `'WCAG2A'` or `'WCAGA2A'` or `'WCAG2AAA'`             | `'WCAG2AA'`   |
 
 Here's how these inputs can be used in `netlify.toml`, with comments to explain how each input affects the plugin's behavior:
 
@@ -111,6 +112,8 @@ Here's how these inputs can be used in `netlify.toml`, with comments to explain
     failWithIssues = false
     # Ignore all HTML files in `/admin`
     ignoreDirectories = ['/admin']
+    # Ignore any accessibility issues associated with an element matching this selector
+    ignoreElements = '.jumbotron > h2'
     # Perform a11y check against WCAG 2.1 AAA
     wcagLevel = 'WCAG2AAA'
 ```